Miniaturization Design Of Optical System Of Middle Infrared/laser Dual-mode Seeker

In the modern high-tech war, precision weapons demonstrate extraordinaryadvantages, and play an irreplaceable role in the success of the war. However, with thedevelopment of various kinds of interference, the battlefield environment isincreasingly complex. In order to accomplish combat missions better, it requires thedevelopment of dual mode compound homing technology. Not only can it play theadvantages of the two modes and build a complementary, but also can overcome theirshortcomings, to form a guidance system with stronger combat capability. It can satisfythe demand of remote precision strikes in the future high-tech combat environment,and is an important military development direction for all countries.At present, our research in the field of guidance technology is far less than thelevel of Europe and the United States, and many guidance scheme is still in the stageof theoretical research, not be equipped to seeker. For the current development status,we need to increase manpower and material inputs, to carry out the further research incompound homing technology. This paper researches an infrared imaging/laser radardual-mode composite guidance system, and according to the miniaturizationrequirements of the seeker guidance system, we design an optical system which iscompact and small.First, according to the design requirements of the guidance system, the paperdetermines the overall scheme of the system, and the infrared/laser dual mode sensorhas a common receiving aperture. By infrared imaging range model and laser radardistance equation, the paper has determined the performance indicators of the opticalsystem, and elaborates the method of determining the performance parameters of eachoptical system.Secondly, in the design of infrared imaging systems, due to the common aperture,the catadioptric structure has been selected for the initial structure of the infraredoptical system, which is conducive to the separation of the infrared energy and laserenergy. The infrared imaging system is required to be compact and have high imagingquality, and needs athermal design and tolerance analysis, to maintain a stable imagequality and good optical performance at the temperature range of-40~60degreeCentigrade.Finally, according to the performance parameters of the overall scheme, the laseremission system and laser receiving system have been designed, and carried out imagequality evaluation through them respectively. The optimized optical system possessescompact structure, good performance, and can meet the application requirements. And this paper accomplishes the tolerance analysis of two optical systems, and gives thereasonable tolerance allocation for them.